Andy,
Very sorry to hear about your loss of Sallie. I have seen you mention her in many of your posts over the years and can appreciate how important she was to your life. My pets also become a huge love of my life and I too have had to put down some of my best friends and favorite family members. A couple in particular were exceptionally hard and painful as they were such a huge part of the joy in my life. I feel your pain.
Best wishes to you and your family to help cope.
.